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WorksheetsWCM Chapter 5
Total questions: 85
Worksheet time: 43mins
'LoRa', 'Narrow-Band IOT' and 'Sig-Fox' are examples of LPWANs that feature _________________ range and ______________________battery consumption.
short , high
long, low
short, low
long, high
'LoRa' is a _____________________ technique derived from 'Chirp Spread Spectrum ' technology.
Frequency modulation
Amplitude modulation
Spread Spectrum Modulation
Phase modulation
The ________________ take care of frequency assignment and transmission of baseband information using RF carrier with the help of antenna over air.
Physical layer
MAC layer
Application layer
RF layer
'Sigfox' networks run on the unlicensed spectrum of _____ MHz (Europe) --------- MHz ( Rest of the world)
88, 90
870, 920
868, 902
888, 950
'Sigfox' networks required a bandwidth of below ______________ kHz.
400
300
200
100
'LoRa' can transmit over long distances of ________ using very low power
10 - 20 m
15 - 20 km
1000- 2000 km
10 - 200 m
LoRa -Based sensors can operate on small batteries for _________________
seconds
days
months
years
Which one is Not LoRa Protocol Stack??
Application Layer
MAC Layer
LLC Layer
RF layer
Class A of 'MAC' layer takes care of ________________
Efficient (Beacon)
Least Efficient (Continuous)
Most Energy Efficient (Baseline)
Not Efficient ( Discrete)
During operation, 'Sigfox' uses _____ bytes Upload per payload to transfer data.
1
2
6
12
What is the main goal of wireless communication for sensor nodes in an IoT solution?
To send data over long distances using high power transmission
To be portable and battery-operated
To allow long-range communications at a high bit rate
To monitor the vital parameters of the environment
What is the main limitation of Bluetooth Low-Energy technology for use as remote sensors in IoT solutions?
It can send data over long distances
It is not battery-operated
It can’t send data over long distance
It has low bit rate
What is the purpose of a Low-Power Wide-Area Network in IoT solutions?
To send data over long distances using high power transmission
To allow long-range communications at a low bit rate
To monitor the vital parameters of the environment
To be portable and battery-operated
Which of the following is an example of a Low-Power Wide-Area Network?
Bluetooth Low-Energy
LoRa
High-Power Wide-Area Network
Zigbee
What is the main challenge for sensors to be portable in a typical IOT solution?
High power transmission
Low battery consumption
Short transmission range
Lack of processing power
What is the main advantage of Bluetooth Low-Energy technology for battery-operated sensors?
High power transmission
Low battery consumption
Short transmission range
High data transmission rate
What is a Low-Power Wide-Area Network (LPWAN)?
A type of wireless network designed for high bit rate communication over long distance
A type of wireless network designed for high data transmission rate among things
A type of wireless network designed for low bit rate communication over short distance
A type of wireless network designed for low bit rate communication over long distance
What is LoRa an example of?
High power transmission network
Low battery consumption network
Short transmission range network
Low-Power Wide-Area Network
What applications make Low-Power Wide-Area Network (LPWAN) suitable for remote sensors?
Smart Metering, Inventory Tracking, and Vending Machines
Data Processing, Inventory Management, and Financial Transactions
High-speed Data Transmission, Video Streaming, and Gaming
Health Monitoring, Environmental Sensing, and Location Tracking
What is a typical application of LPWANs?
Smart Metering
Inventory Tracking
Vending Machines
All of the mention
What is a feature of LPWANs that makes it suitable for remote sensors?
A. High-power transmission
B. Long-range communication
C. Low battery consumption
Both B & C
What is "LoRa" technology?
A wireless radio frequency technology introduced by a company called ‘Semtech’
A video transmission technology
A technology used to transmit audio information
A technology used to transmit text information
What is the "LoRa" stand for?
Long Radio
Long Range
Large Radio
Large Range
What is the technique used in "LoRa" technology derived from?
Spread Spectrum Modulation
Spread Wave Modulation
Chirp Spread Spectrum
Chirp Wave Spectrum
How far can "LoRa" technology transmit information?
5-10km
10-15km
15-20km
20-25km
Is "LoRa" technology suitable for Audio/Video transmission?
Yes
No
What is LoRa radio technology introduced by?
Intel
Qualcomm
Semtech
Texas Instruments
What is the modulation technique used in LoRa radio technology?
Frequency Modulation
Amplitude Modulation
Chirp Spread Spectrum
Spread Spectrum Modulation
What is the main advantage of using "LoRa" technology in wireless communication?
High Bandwidth
Audio/Video transmission
Long range communication with low power consumption
Short range communication with high power consumption
What does LoRaWAN consist of?
End Devices and Servers
End Devices, Gateway, and Servers
End Devices and Gateway
Servers and Gateway
What does a LoRa Node consist of?
Radio Module and Application
Microcontroller and Radio Module
Microcontroller and Application
Radio Module and Wi-Fi
What is the role of the Microcontroller in a LoRa Node?
To transmit data to the air
To listen to multiple LoRa Nodes
To read sensor data
To take information to the Internet
What is the role of a LoRa Gateway?
To transmit data to the air
To listen to multiple LoRa Nodes
To take information to the Internet
To interpret the data collected by LoRa-based devices
Can a single LoRa Gateway listen to multiple LoRa Nodes?
No
Yes
Only with the help of a Network Server
Only with the help of a Microcontroller
How does information from the LoRa Node reach the end user?
Directly from the Node
Through an application interface
Through a Gateway and the Internet
Through a Network Server and the Internet
What is the Uplink used for?
To send information from the Gateway to the Node
To send information from the Node to the Gateway
To send information from the Network Server to the Gateway
To send information from the Application to the Network Server
What is the Network Server responsible for?
To send information via Wi-Fi, Ethernet, or Cellular
To listen to multiple LoRa Nodes
Network management functions
To interpret the data collected by LoRa-based devices
What is the main function of a LoRa Gateway?
To collect sensor data from Nodes
To send information from Node to the Internet
To send information from Gateway to Node
To send information from Gateway to Network Server
Which of the following is not the function of Network Server in LoRaWAN?
Over-the-air activation
Administration
Data transmission
Traffic management
Can a single LoRa Node send information to multiple Gateways?
Yes
No
How does the Gateway send information to the Network Server in LoRaWAN?
Through Wi-Fi
Through Ethernet
Through Cellular
All of the mention
What is the main function of Applications in LoRaWAN?
To collect sensor data from Nodes
To send information from Node to the Internet
To interpret data collected by LoRa-based devices
To send information from Gateway to Network Server
What is the term used to describe sending information from the Node to the Gateway in LoRaWAN?
Uplink
Downlink
Gateway
Network Server
What is the term used to describe sending information from the Gateway to the Node in LoRaWAN?
Uplink
Downlink
Gateway
Network Server
What is the main function of the RF layer in the LoRa Protocol Stack?
Handling radio frequency assignment and transmission of baseband information
Forming the preamble, header and CRC
Managing MAC management messages between End Device and Server
Designing the application layer based on usage
Which layer of the LoRa Protocol Stack is responsible for security (AES128 Encryption) and mesh topology?
Application Layer
Physical Layer
MAC Layer
RF Layer
Which layer of the LoRa Protocol Stack is responsible for security (AES128 Encryption) and mesh topology?
Application Layer
Physical Layer
MAC Layer
RF Layer
What is the purpose of the Physical Layer in the LoRa Protocol Stack?
Designing the application layer based on usage
Managing MAC management messages between End Device and Server
Handling radio frequency assignment and transmission of baseband information
Modulating raw data and converting it for uplink transmission
What is the role of the LoRa Alliance in the LoRaWAN protocol?
It is responsible for providing the LoRa radio chips
It drives the standardization and global harmonization of the LoRaWAN protocol
It manages the different classes of End Devices
It is responsible for the design of the Application Layer
Which layer of the LoRa Protocol Stack is designed based on usage such as health care, smart city, smart farming, smart grid, etc.?
RF Layer
Physical Layer
MAC Layer
Application Layer
Which class of End Devices in the MAC layer of the LoRa Protocol Stack is the most energy efficient?
A
B
C
All are equally efficient
What is the main function of the MAC Layer in the LoRa Protocol Stack?
Designing the application layer based on usage
Modulating raw data and converting it for uplink transmission
Managing MAC management messages between End Device and Server
Handling radio frequency assignment and transmission of baseband information
What layer in the LoRaWAN protocol stack takes care of radio frequency assignment and transmission of baseband information using RF carrier over the air?
Physical Layer
MAC Layer
Application Layer
RF Layer
What layer in the LoRaWAN protocol stack takes care of MAC management messages between End Device and Server, as well as energy consumption, security, and mesh topology?
Application Layer
RF Layer
Physical Layer
MAC Layer
What is the primary purpose of the Physical Layer in the LoRaWAN protocol stack?
To handle MAC management messages
To form preamble, header, and perform CRC
To take care of radio frequency assignment
To design the application layer based on usage
What is the function of the Application Layer in the LoRaWAN protocol stack?
To handle MAC management messages
To form preamble, header, and perform CRC
To design the application layer based on usage
To take care of radio frequency assignment
Who is responsible for the standardization and global harmonization of the LoRaWAN protocol?
Semtech
The LoRa Alliance
Actility
Cisco
What are some of the founding members of the LoRa Alliance?
Actility, Cisco, Eolane, IBM
Bouygues Telecom, KPN, SingTel
Microchip Technology, Sagemcom
All of the mention
What type of modulation does the Physical Layer use for uplink transmission in the LoRaWAN protocol stack?
AES128 Encryption
LoRa CSS/FSK or GFSK
Beacon
Continuous
What is Sigfox Technology used for?
High frequency applications
Low frequency applications
Ultra-high frequency applications
Ultra-high frequency applications
Who are the major competitors of Sigfox in the LPWAN space?
GSM
Wi-Fi
LoRa
Zigbee
On what frequency does Sigfox network run in Europe?
902 MHz
2.4 GHz
868 MHz
5 GHz
What is the bandwidth requirement for Sigfox network?
Below 50 KHz
Below 200 KHz
Below 300 KHz
Below 100 KHz
How does Sigfox support data transmission?
By using Quadrature Amplitude Modulation (QAM)
By using Binary Phase-Shift Keying (BPSK)
By using Amplitude-Shift Keying (ASK)
By using Amplitude-Shift Keying (ASK)
How many bytes can be sent as a message in Sigfox network?
8 bytes
0-12 bytes
0-6 bytes
12 bytes
How effective are downloads (base-to-endpoint communications) in Sigfox network?
Very effective
Moderately effective
Less effective
Not effective
How many messages can be sent in a day using Sigfox network?
100 messages
50 messages
140 messages
200 messages
What is 'Sigfox'?
A wireless communication technology
A wired communication technology
An optical communication technology
A satellite communication technology
Which type of frequency does 'Sigfox' operate in?
Licensed spectrum
Unlicensed spectrum
Shared spectrum
Open spectrum
What is the data rate supported by 'Sigfox'?
Up to 100 Kbps
Up to 10 Kbps
Up to 1 Kbps
Up to 0.1 Kbps
How does 'Sigfox' transfer data?
By using AM transmission
By using FM transmission
By using BPSK transmission
By using QAM transmission
What is the topology of the Layer #1 in the Sigfox network architecture?
Star
Mesh
Bus
Ring
What is the purpose of the Sigfox cloud in the Sigfox network architecture?
To receive messages from IOT devices
To process and transmit messages from the base stations
To store messages and modems' metadata
All of the mentions
How does the Sigfox network connect to the public internet?
Through direct connections
Through secure VPN connections
Through APIs
Through web interfaces
Who owns all of the technology used in the Sigfox network architecture?
The end customers
The Silicon manufacturers
The Sigfox Operators
Sigfox
Who provides the endpoint technology in the Sigfox network?
Sigfox
Large manufacturers such as STMicroelectronics, Atmel, and Texas Instruments
The Sigfox Operators
End customers
What is the function of the Layer #2 in the Sigfox network architecture?
To receive messages from IOT devices
To process and transmit messages from the base stations
To store messages and modems' metadata
To connect to the public internet
What is the main role of the Sigfox cloud in the Sigfox network architecture?
To receive messages from IOT devices
To process and transmit messages from the base stations
To store messages and modems' metadata
To manage base stations
How can the Sigfox Operators and end customers access the Sigfox ecosystem?
Through APIs
Through direct connections
Through web interfaces
Through secure VPN connections
What are the two layers of the Sigfox network architecture?
Base Stations and End-Points
Sigfox Cloud and Base Stations
End-Points and Sigfox Cloud
Base Stations and Sigfox Cloud
What does the first layer of the Sigfox network serve to do?
Receive messages from the Sigfox Cloud
Process and send messages to customer systems
Receive messages from IOT devices
Store messages and modems' metadata
What is the role of the Sigfox Cloud in the second layer of the Sigfox network?
Receive messages from IOT devices
Process and send messages to customer systems
Monitor the network and perform base station management
All of the mentions
Who can link to the Sigfox network ecosystem?
End-Points only
Sigfox Operators only
End Customers only
Sigfox, Sigfox Operators & End Customers
How are the two layers of the Sigfox network connected?
Through the public internet
Through private internet
Through direct connections
Through local networks
How does Sigfox give away its endpoint technology?
By selling it
By licensing it
By giving it away under certain agreed business terms
By renting it
